/* ============================================================
   landing.css — Premium landing page for TAMBAIYAN
   Self-contained (the landing page does not load style.css).
   Dark theme, purple/silver, parallax + 3D + glassmorphism.
   ============================================================ */

:root {
    --bg:        #08070d;
    --bg-2:      #0d0b16;
    --violet:    #8b5cf6;
    --violet-2:  #6d28d9;
    --violet-lt: #b794ff;
    --silver:    #d7d9e0;
    --text:      #eceef4;
    --muted:     #a2a6b8;
    --faint:     #6b6f82;
    --card:      rgba(24, 20, 38, 0.6);
    --border:    rgba(139, 92, 246, 0.18);
    --radius:    16px;
    --font:      "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
}

a { color: var(--violet-lt); text-decoration: none; }

.grad {
    background: linear-gradient(100deg, #a78bfa, #e879f9 55%, #c4b5fd);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--violet-lt);
    margin-bottom: 14px;
}

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid transparent;
    border-radius: 12px;
    padding: 12px 22px;
    font-size: 15px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: transform .12s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
    color: #fff;
    background: transparent;
}
.btn-lg { padding: 15px 30px; font-size: 16px; border-radius: 14px; }
.btn-block { width: 100%; }
.btn:active { transform: translateY(1px) scale(.99); }

.btn-primary {
    background: linear-gradient(135deg, var(--violet), var(--violet-2));
    box-shadow: 0 10px 30px rgba(139, 92, 246, .35), inset 0 1px 0 rgba(255,255,255,.15);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(139, 92, 246, .5), inset 0 1px 0 rgba(255,255,255,.2);
}
.btn-ghost {
    background: rgba(255,255,255,.03);
    border-color: var(--border);
    color: var(--text);
    backdrop-filter: blur(6px);
}
.btn-ghost:hover { border-color: var(--violet); color: #fff; background: rgba(139,92,246,.12); }

/* ---------- Top nav ---------- */

.lp-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 34px;
    transition: background .3s ease, padding .3s ease, border-color .3s ease;
    border-bottom: 1px solid transparent;
}
.lp-nav.scrolled {
    background: rgba(8, 7, 13, .72);
    backdrop-filter: blur(14px);
    border-bottom-color: var(--border);
    padding: 10px 34px;
}
.lp-brand img { height: 46px; display: block; filter: drop-shadow(0 4px 12px rgba(139,92,246,.5)); }
.lp-nav.scrolled .lp-brand img { height: 38px; }

.lp-nav-links { display: flex; align-items: center; gap: 14px; }
.lp-nav-links a { color: var(--muted); font-weight: 600; font-size: 15px; }
.lp-nav-links a:hover { color: #fff; }

/* ---------- Loader ---------- */

.loader {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(60% 60% at 50% 40%, rgba(139,92,246,.18), transparent 70%),
        var(--bg);
    transition: opacity .6s ease, visibility .6s ease;
    animation: loader-failsafe .6s ease 6.5s forwards;
}
.loader.hidden { opacity: 0; visibility: hidden; }

@keyframes loader-failsafe {
    to {
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
    }
}

.loader-inner { text-align: center; width: min(340px, 80vw); }
.loader-logo {
    width: 220px;
    max-width: 60vw;
    margin-bottom: 30px;
    animation: floaty 3s ease-in-out infinite;
    filter: drop-shadow(0 10px 40px rgba(139,92,246,.55));
}
.loader-bar {
    height: 6px;
    width: 100%;
    background: rgba(255,255,255,.08);
    border-radius: 999px;
    overflow: hidden;
}
.loader-bar-fill {
    display: block;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--violet-2), #e879f9);
    border-radius: 999px;
    transition: width .25s ease;
}
/* Two-line loader text with a parallax entrance driven from JS (.is-in). */
.loader-texts {
    margin-top: 18px;
    perspective: 700px;
}
.loader-text {
    margin: 0;
    color: var(--muted);
    letter-spacing: 2px;
    font-size: 13px;
    text-transform: uppercase;
    /* Hidden until JS adds .is-in, so the two lines appear in sequence. */
    opacity: 0;
    transform: translateZ(-260px) translateY(16px);
    filter: blur(6px);
}
.loader-text-1 { font-weight: 700; }
.loader-text-2 {
    margin-top: 10px;
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--violet-lt);
}

/* Parallax rush-in from depth; blur clears as the line settles. */
.loader-text.is-in { animation: loader-text-in .7s cubic-bezier(.16,.84,.44,1) both; }
/* Line 1 also flashes once it has landed. */
.loader-text-1.is-in { animation: loader-text-in .7s cubic-bezier(.16,.84,.44,1) both, loader-flash 1s ease .7s 1; }

@keyframes loader-text-in {
    0%   { opacity: 0; transform: translateZ(-260px) translateY(16px); filter: blur(6px); }
    55%  { opacity: 1; }
    100% { opacity: 1; transform: translateZ(0) translateY(0); filter: blur(0); }
}
@keyframes loader-flash {
    0%, 100% { color: var(--muted); text-shadow: none; }
    50%      { color: #fff; text-shadow: 0 0 18px rgba(232,121,249,.9), 0 0 42px rgba(139,92,246,.7); }
}

@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* ---------- Hero ---------- */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 20px 80px;
    overflow: hidden;
}

.hero-bg { position: absolute; inset: -10%; z-index: 0; pointer-events: none; }
.layer { position: absolute; inset: 0; will-change: transform; }

.layer-grid {
    background-image:
        linear-gradient(rgba(139,92,246,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(139,92,246,.06) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(70% 60% at 50% 45%, #000 40%, transparent 80%);
    -webkit-mask-image: radial-gradient(70% 60% at 50% 45%, #000 40%, transparent 80%);
}
.layer-glow-a {
    background: radial-gradient(45% 45% at 25% 30%, rgba(139,92,246,.35), transparent 70%);
}
.layer-glow-b {
    background: radial-gradient(40% 40% at 78% 65%, rgba(232,121,249,.22), transparent 70%);
}
.layer-stars {
    background-image:
        radial-gradient(1.5px 1.5px at 20% 30%, rgba(255,255,255,.7), transparent),
        radial-gradient(1.5px 1.5px at 70% 20%, rgba(255,255,255,.5), transparent),
        radial-gradient(1px 1px at 40% 70%, rgba(255,255,255,.6), transparent),
        radial-gradient(1px 1px at 85% 55%, rgba(255,255,255,.5), transparent),
        radial-gradient(1.5px 1.5px at 55% 85%, rgba(255,255,255,.5), transparent),
        radial-gradient(1px 1px at 10% 80%, rgba(255,255,255,.4), transparent);
    opacity: .8;
}

.hero-3d {
    position: absolute;
    inset: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero-content { position: relative; z-index: 2; max-width: 820px; }

.hero-title {
    font-size: clamp(2.4rem, 6vw, 4.4rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -1px;
    margin-bottom: 22px;
    text-shadow: 0 6px 40px rgba(0,0,0,.6);
}
.hero-sub {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--muted);
    max-width: 620px;
    margin: 0 auto 34px;
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.hero-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
    margin-top: 54px;
}
.hero-stats div { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 30px; font-weight: 800; color: #fff; }
.hero-stats span { font-size: 13px; color: var(--faint); letter-spacing: 1px; text-transform: uppercase; }

.scroll-hint {
    position: absolute;
    bottom: 26px; left: 50%;
    transform: translateX(-50%);
    width: 26px; height: 42px;
    border: 2px solid rgba(255,255,255,.25);
    border-radius: 14px;
    z-index: 2;
}
.scroll-hint span {
    position: absolute;
    top: 8px; left: 50%;
    width: 4px; height: 8px;
    margin-left: -2px;
    background: var(--violet-lt);
    border-radius: 2px;
    animation: scroll 1.8s infinite;
}
@keyframes scroll { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 80% { opacity: 0; transform: translateY(14px); } }

/* ---------- Sections ---------- */

.features, .how { position: relative; z-index: 2; padding: 100px 22px; max-width: 1120px; margin: 0 auto; }
.features { background: linear-gradient(180deg, transparent, rgba(13,11,22,.6), transparent); }

.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; letter-spacing: -.5px; }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 22px;
}
.feature-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 26px;
    backdrop-filter: blur(10px);
    transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--violet);
    box-shadow: 0 20px 50px rgba(139,92,246,.2);
}
.feature-icon {
    width: 54px; height: 54px;
    display: flex; align-items: center; justify-content: center;
    font-size: 26px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(139,92,246,.25), rgba(232,121,249,.12));
    border: 1px solid var(--border);
    margin-bottom: 18px;
}
.feature-card h3 { font-size: 19px; margin-bottom: 8px; }
.feature-card p { color: var(--muted); font-size: 15px; }

/* ---------- How it works ---------- */

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 22px;
}
.step {
    position: relative;
    padding: 30px 26px 30px 30px;
    border-left: 2px solid var(--border);
    background: linear-gradient(90deg, rgba(139,92,246,.05), transparent);
    border-radius: 0 var(--radius) var(--radius) 0;
}
.step-num {
    font-size: 42px;
    font-weight: 800;
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(139,92,246,.5);
    display: block;
    margin-bottom: 10px;
}
.step h3 { font-size: 19px; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 15px; }

.how-cta { text-align: center; margin-top: 50px; }

/* ---------- Footer ---------- */

.lp-footer {
    text-align: center;
    padding: 50px 20px;
    border-top: 1px solid var(--border);
    color: var(--faint);
}
.lp-footer-logo { height: 44px; margin-bottom: 14px; opacity: .85; }

/* ---------- Form controls (shared by modal) ---------- */

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 600; color: var(--muted); }
.form-control {
    width: 100%;
    background: rgba(8,7,13,.6);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    padding: 12px 14px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.form-control:focus {
    outline: none;
    border-color: var(--violet);
    box-shadow: 0 0 0 3px rgba(139,92,246,.25);
}
.form-hint { font-size: 12.5px; color: var(--faint); margin-top: 5px; }
.mt-0 { margin-top: 0; margin-bottom: 18px; }

/* ---------- Auth modal ---------- */

.modal {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal.open { display: flex; }
.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(4, 3, 8, .7);
    backdrop-filter: blur(6px);
    animation: fade .25s ease;
}
.modal-card {
    position: relative;
    width: min(420px, 100%);
    background: linear-gradient(180deg, rgba(28,22,45,.95), rgba(16,13,26,.97));
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 30px 30px 34px;
    box-shadow: 0 30px 80px rgba(0,0,0,.6), 0 0 60px rgba(139,92,246,.15);
    animation: pop .28s cubic-bezier(.2,.9,.3,1.2);
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop { from { opacity: 0; transform: translateY(18px) scale(.96); } to { opacity: 1; transform: none; } }

.modal-close {
    position: absolute;
    top: 14px; right: 16px;
    background: none; border: none;
    color: var(--muted);
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
}
.modal-close:hover { color: #fff; }

.auth-tabs {
    display: flex;
    gap: 6px;
    background: rgba(8,7,13,.6);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 5px;
    margin-bottom: 22px;
}
.auth-tab {
    flex: 1;
    padding: 10px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--muted);
    font-weight: 700;
    font-family: inherit;
    font-size: 15px;
    cursor: pointer;
    transition: background .2s ease, color .2s ease;
}
.auth-tab.is-active {
    background: linear-gradient(135deg, var(--violet), var(--violet-2));
    color: #fff;
    box-shadow: 0 6px 18px rgba(139,92,246,.35);
}

.auth-form { display: none; }
.auth-form.is-active { display: block; animation: fade .2s ease; }

.auth-error {
    background: rgba(255, 92, 114, .12);
    border: 1px solid rgba(255, 92, 114, .4);
    color: #ff9aa8;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 14px;
    margin-bottom: 16px;
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .lp-nav { padding: 12px 16px; }
    .lp-nav-links { gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
    /* Hide only plain text links; keep buttons (Login/Register/Logout) reachable. */
    .lp-nav-links a:not(.btn) { display: none; }
    .lp-nav-links .btn { padding: 8px 14px; font-size: 13px; }
    .hero-stats { gap: 20px 26px; flex-wrap: wrap; justify-content: center; }
    .hero-cta { flex-wrap: wrap; }
    .hero-cta .btn { flex: 1 1 auto; justify-content: center; }
    .btn-lg { padding: 13px 22px; }
}
@media (max-width: 400px) {
    .lp-brand img { height: 30px; }
    .hero-cta .btn { flex-basis: 100%; }
}

/* Respect users who prefer reduced motion. */
@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; scroll-behavior: auto !important; }
    .loader-logo { animation: none; }
    /* Animations are off, so reveal both loader lines statically. */
    .loader-text { opacity: 1; transform: none; filter: none; }
}